i had impemented fragment in my project. I added an ImageButton in my fragment XML. But when i inflated it to my activity there is two buttons in my layout activity. Why my fragment returned two views? and how to fix it have to normal view like in my fragment XML? Thanks in advance.
screenshot
*I am sorry i can not upload image, my reputations is not enough
You can look at the picture, there is 2 buttons. I just want one button.
below is my activity.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:orientation="vertical"
android:padding="10dp" >
<fragment
android:id="#+id/fragment1"
android:name="com.candlelightstudio.letsbesmartkid.ToolbarAbout"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/bg_pilihsoal"
android:orientation="vertical" >
<ListView
android:id="#android:id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/transparent"
android:cacheColorHint="#android:color/transparent" >
</ListView>
</LinearLayout>
</LinearLayout>
below is my fragment xml, named toolbar_about
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/transparent"
android:orientation="vertical" >
<ImageButton
android:id="#+id/btn_ToolAbout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:background="#android:color/transparent"
android:src="#android:drawable/ic_menu_info_details" />
</LinearLayout>
below is ToolbarAbout.java
package com.candlelightstudio.letsbesmartkid;
import android.os.Bundle;
import android.app.Fragment;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageButton;
import android.support.v4.app.FragmentActivity;
import android.app.FragmentManager;
public class ToolbarAbout extends Fragment {
private FragmentAbout about;
private FragmentManager fm;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View v = inflater.inflate(R.layout.toolbar_about, container, false);
ImageButton tool = (ImageButton) v.findViewById(R.id.btn_ToolAbout);
final Context c = inflater.getContext();
about = new FragmentAbout();
fm = getFragmentManager();
tool.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
about.show(fm, "About");
}
});
return v;
}
}
below is piece of my activity.java for inflate the fragment
Fragment fr = new ToolbarAbout();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.fragment1, fr);
fragmentTransaction.commit();
SOLVED
Only delete the code for inflating fragment, and it's work properly
delete this code
Fragment fr = new ToolbarAbout();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.fragment1, fr);
fragmentTransaction.commit();
cause i have declare a class for my fragment, here :
<fragment
android:id="#+id/fragment1"
android:name="com.candlelightstudio.letsbesmartkid.ToolbarAbout"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
you can see i added android:name="com.candlelightstudio.letsbesmartkid.ToolbarAbout"
Thanks a lot #Manpreet Singh
I guess the ToolbarAbout fragment will be inflated automatically in your app since you provided the following line in your xml :
android:name="com.candlelightstudio.letsbesmartkid.ToolbarAbout
so there is no need to replace fragment for this so remove these lines from activity :
Fragment fr = new ToolbarAbout();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.fragment1, fr);
fragmentTransaction.commit();
You add the fragment via code and xml. For example to do it through code only, you'd change the fragment view to a container:
<FrameLayout android:id="#+id/fragment1"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
Related
I have tried to load a fragment dynamically by adding a fragment(AnotherFragment) to a layout(sample_content_fragment) in mainactivity .But it doesn't work when i click button1.The code below have run so the error isn't the Button.
public void onClick(View v) {
switch (v.getId()) {
case R.id.button1:
AnotherFragment fragment = new AnotherFragment();
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction transaction = fragmentManager.beginTransaction();
transaction.add(R.id.sample_content_fragment, fragment);
transaction.commit();
break;
}
And here you can see mainactivity's layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<fragment
android:id="#+id/fregment_test"
android:name="com.example.henucmapus.TestFragment"
android:layout_width="match_parent"
android:layout_height="112dp" />
<FrameLayout
android:id="#+id/sample_content_fragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
</LinearLayout>
Here is the fragment i want to load.
import android.app.Fragment;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class AnotherFragment extends Fragment{
public View OnCreateView(LayoutInflater inflater,ViewGroup container,
Bundle savedInstanceState){
View view =inflater.inflate(R.layout.anotherfragment,container, false);
return view;
}
}
Here is the fragment layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/t1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="11111111111"
/>
</LinearLayout>
OnCreateView means nothing in Android terms (at least in Java, Xamarin does have it capitalized).
The correct method you want is onCreateView. (lowercase on)
If you used annotations, you could see that.
For example.
public class AnotherFragment extends Fragment{
#Override
public View onCreateView(LayoutInflater inflater,ViewGroup container,
Bundle savedInstanceState){
View view = inflater.inflate(R.layout.anotherfragment,container, false);
return view;
}
}
And if that doesn't work, you seem to have no R.id.button1 in your main layout, so there's no fragment transaction being done anyway
I am learning Android from a couple of weeks.
I am now trying to use fragments. And using the ideas from https://github.com/dogriffiths/HeadFirstAndroid
from book
https://books.google.com/books?id=qkzrCQAAQBAJ&pg=PA275&lpg=PA275&dq=pure+java+class+fragments&source=bl&ots=Ayz-JbqS4r&sig=f2DBRNgX_wrvBnGrDhJiIfHNhrE&hl=en&sa=X&ved=0ahUKEwjD6OHS67rPAhUG1CYKHczIBnAQ6AEIMDAD#v=onepage&q=pure%20java%20class%20fragments&f=false
I am getting
'replace(int, android.app.fragment)' in
'android.app.fragmentTransaction' cannot be applied to
which is also
Error: ContactDetailFragment cannot be converted to Fragment
source code
import android.app.Activity;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.View;
public class ContactActivity extends Activity implements ContactListFragment.ContactListListener{
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_contact);
}
#Override
public void itemClicked(long id){
//method also defined in the listener
View fragmentContainer = findViewById(R.id.fragment_detail_container);
if (fragmentContainer != null){
ContactDetailsFragment detailsFragment = new ContactDetailsFragment();
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
detailsFragment.setContact(id);
//fragmentTransaction.replace(R.id.fragment_detail_container, detailsFragment);
fragmentTransaction.replace(R.id.fragment_detail_container, detailsFragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
fragmentTransaction.commit();
}
}
}
contactactivity.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/activity_contact"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:baselineAligned="false"
tools:context="esu.uco.rawal.p5rabina.ContactActivity">
<fragment
class="esu.uco.rawal.p5rabina.ContactListFragment"
android:layout_width="0dp"
android:layout_weight ="1"
android:layout_height="match_parent"
android:id="#+id/contact_list_frag"/>
<FrameLayout
android:id="#+id/fragment_detail_container"
android:layout_width="0dp"
android:layout_weight="2"
android:layout_height="match_parent"
>
</FrameLayout>
</LinearLayout>
Check you imports. You may use wrong packages.
There are two Fragment classes:
Fragment
v4 Support Library
Fragment
as well as two FragmentTransaction classes:
FragmentTransaction
v4 Support Library FragmentTransaction
You can't use a v4 FragmentTransaction with a native Fragment or the opposite.
You may also want to read the Support Library Features docs.
I would like to add multiple fragments in a single layout. However, I'm getting errors when I include additional fragments. Kindly assist.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal"
android:background="#F0F8FF"
android:id="#+id/my_layout">
<ExpandableListView
android:id="#+id/lvExp"
android:layout_width="250dp"
android:layout_height="match_parent" >
</ExpandableListView>
<fragment
android:id="#+id/fragw3"
android:name="com.example.engineercalclist2.arrayHistory"
android:layout_width="wrap_content"
android:layout_height="match_parent" />
</LinearLayout>
I hope i understood right, but here it goes:
Instead of adding Fragments directly from xml, you can use a FrameLayout. Then on your code ,lets say when you click on your ExpandableListView item, you can change the fragment. Here is a simple example.
Add this to your xml.
<FrameLayout
android:id="#+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</FrameLayout>
Now move on to your Activity, declara a Fragment
Fragment fragment = null;
Then on your OnItemClickListener for your ExpandableListView set the fragment to the fragment you want to change like this.
fragment = new Fragment_ToGo();
Then use this
FragmentTransaction ft = getFragmentManager().beginTransaction();
getFragmentManager().beginTransaction().commit();
ft.replace(R.id.content_frame, fragment);
ft.commit();
EDIT
Now, I'm going to use the tutorial from here. I suggest you to read there first, down below is my explanation.
First of all, if your API is older than 11 your MainActivity ,which contains Fragments, should be extended to FragmentActivity. If you are using API 11 or newer, you are good to go.
Now, create your Fragment(s) like this.
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.ViewGroup;
public class ArticleFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.article_view, container, false);
}
}
This is going to be your Activity's XML:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<fragment android:name="com.example.android.fragments.HeadlinesFragment"
android:id="#+id/headlines_fragment"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="match_parent" />
<fragment android:name="com.example.android.fragments.ArticleFragment"
android:id="#+id/article_fragment"
android:layout_weight="2"
android:layout_width="0dp"
android:layout_height="match_parent" />
And finally, your MainActivity:
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
public class MainActivity extends FragmentActivity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.news_articles);
}
}
Now since i don't know what error do you get, I'm only able to help you to this point. I will edit my answer again when you post your Logcat.
please help
When I run my ListFragment actitivy and click on a fragment (either Buick or Mazda), the layout of the fragment I clicked on is supposed to replace and cover the entire screen but the
container containing the list of cars stays on the screen and my fragment layout is shown below it. How can I make my fragment's layout replace the entire screen?
I couldn't post my AVD image showing the screen because I don't have enough reputatons to do
but the screen was showing as below when I clicked on the first item on the list.
Buick
Mazda
Hello! It's a Buick
my Mainactivity
package in.cars.demo;
import android.app.Activity;
import android.os.Bundle;
public class CarsMainActivity extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
My ListFragment activity
package in.cars.demo;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.app.ListFragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class CarsList extends ListFragment {
String[] cars = new String[] { "Buick", "Mazda" };
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ListAdapter myListAdapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, cars);
setListAdapter(myListAdapter);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.cars_container, container, false);
}
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
Toast.makeText(getActivity(), getListView().getItemAtPosition(position).toString(), Toast.LENGTH_LONG).show();
switch (position) {
case 0:
Fragment fragment1 = new Fragment1();
FragmentTransaction transaction1 = getFragmentManager().beginTransaction();
transaction1.replace(R.id.car_fragment, fragment1);
transaction1.addToBackStack(null);
transaction1.commit();
break;
case 1:
Fragment fragment2 = new Fragment2();
FragmentTransaction transaction2 = getFragmentManager().beginTransaction();
transaction2.replace(R.id.car_fragment, fragment2);
transaction2.addToBackStack(null);
transaction2.commit();
break;
}
}
}
Fragment1
package in.cars.demo;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Fragment1 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment1, container, false);
}
}
Fragment2
package in.cars.demo;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class Fragment2 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment2, container, false);
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<fragment
android:id="#+id/car_fragment"
android:name="in.cars.demo.CarsList"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
cars_container.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="4dp"
android:paddingRight="4dp">
<ListView android:id="#id/android:list"
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="1"/>
</LinearLayout>
fragment1.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/frag1TV"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Hello! It's a Buick" />
</LinearLayout>
fragment2.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/frag2TV"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Hello! It's a Mazda" />
</LinearLayout>
The problem is that you set the layout_height of your fragment to wrap_content in your main.xml. The visible size will be reduced to the actual size of the fragment.
Change it to match_parent to fill the whole screen:
...
<fragment
android:id="#+id/car_fragment"
android:name="in.cars.demo.CarsList"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
...
Furthermore use match_parent instead of fill_parent in apps with API Level 8+. See this question for more information.
Edit:
You have to change the container for the Fragments. The Fragment set with the tag will be static. Every fragment will be set in addition to this container. To have a dynamic approach use a FrameLayout. Now you can replace the fragment which was in there before.
...
<FrameLayout
android:id="#+id/car_fragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
...
To show your CarsList you have to do a Fragment transaction in your Activity.
getFragmentManager() / getSupportFragmentManager()
.beginTransaction()
.replace(R.id.car_fragment, new CarsList())
.addToBackstack(null)
.commit();
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/white"
android:clickable="true"
android:orientation="vertical">
Try to setUp a color background to your fragment. In this way the background covers the entire space.
It is a little bit late, but maybe I will help someone else. The problem is with 'fragment' in your activity xml layout file (main.xml). You have to change:
<fragment
android:id="#+id/car_fragment"
android:name="in.cars.demo.CarsList"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
to
<fragment
android:id="#+id/car_fragment"
android:name="in.cars.demo.CarsList"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
I have main layout like this
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="#+id/btn_showdetails"
android:layout_width="100dip"
android:layout_height="wrap_content"
android:layout_marginLeft="110dip"
android:layout_marginTop="15dip"
android:text="Show Details" />
</LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal"
android:id="#+id/my_parent_layout"
>
</LinearLayout>
</LinearLayout>
am trying to call another activity in the my_parent_layout using this class
package com.appnetics;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import android.widget.Button;
public class FragmenttestActivity extends FragmentActivity {
Button LogIn = null ;
final FragmentManager fragmentManager = getSupportFragmentManager() ;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LogIn = (Button) findViewById(R.id.btn_showdetails);
LogInEvent() ;
}
public void LogInEvent(){
LogIn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
details fragment = new details();
fragmentTransaction.add(R.id.my_parent_layout, fragment);
fragmentTransaction.commit();
}
});
}
}
the details layout is :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/date_time_label"
android:layout_centerVertical="true"
android:layout_marginLeft="200dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="32dp"
android:textStyle="bold"
android:text="time_label"
/>
<TextView
android:id="#+id/last_view_time"
android:layout_toRightOf="#+id/date_time_label"
android:layout_alignBaseline="#+id/date_time_label"
android:layout_marginLeft="8dip"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="32dp"
/>
</LinearLayout>
and the layout code is
/* $Id: $
*/
package com.appnetics;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
/**
* DateTime
*/
public class details extends Fragment {
private static String getDateTimeString(Date time) {
return new SimpleDateFormat("d MMM yyyy HH:mm:ss")
.format(time);
}
private final String time = getDateTimeString(new Date());
/** #see android.app.Fragment#onCreateView(android.view.LayoutInflater, android.view.ViewGroup, android.os.Bundle) */
#Override
public View onCreateView(
LayoutInflater inflater,
ViewGroup container,
Bundle b)
{
View view = inflater.inflate(
R.layout.details,
container,
false); //!!! this is important
((TextView) view.findViewById(R.id.last_view_time))
.setText(time);
return view;
}
}
the problem is that when click the button, nothing appear , any idea what's wrong in my code
Lets start!
On your details XML:
android:layout_toRightOf="#+id/date_time_label"
android:layout_alignBaseline="#+id/date_time_label"
this two tags are for relative layouts, the parent of the layouts must be of relative type in order to work.
android:layout_centerVertical="true"
This tag is also incorrect, if you want to center the text in the textview you can use two ways or wrap content in textView and set center in its parent or use:
android:gravity="right"
android:width="fill_parent"
This will be the detail_fragment.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/date_time_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="32dp"
android:textStyle="bold"
android:text="time_label"
/>
<TextView
android:id="#+id/last_view_time"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="right"
android:text="view time"
android:textSize="32dp" />
</LinearLayout>
On your main.xml you declare the schema lots of times! should be declared once on your root layout.
LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
So the main.xml will be...
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center_horizontal"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/hello" />
<Button
android:id="#+id/add_fragment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<LinearLayout
android:id="#+id/fragment_holder"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
</LinearLayout>
</LinearLayout>
The fragment is an element that is declared in its class and apply its xml.
public class DetailsFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment, container, false);
}
}
And in the main activity add it to the holder layout:
public class FragmentSimpleTestActivity extends FragmentActivity {
private Button addFragment;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final FragmentManager fragmentManager = getSupportFragmentManager();
addFragment = (Button) findViewById(R.id.add_fragment);
addFragment.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
DetailsFragment fragment = new DetailsFragment();
fragmentTransaction.add(R.id.fragment_holder,fragment, "MY_FRAG");
fragmentTransaction.commit();
}
});
}
}
Its important that fragmentTransaction.add has parameters
1: the id of the view to hold the fragment.
2: the fragment object.
3: a tag that is used to find the fragments in the stack.
and thats all :)
Enjoy your fragments! you can also set animations when adding or removing it.
onCreateView()
The system calls this when it's time for the fragment to draw its user interface for the first time. To draw a UI for your fragment, you
must return a View from this method that is the root of your
fragment's layout. You can return null if the fragment does not
provide a UI.
Call OnCreateView in your fragment class
return inflater.inflate(R.layout.fragmentlayout, container, false);
I had a similar problem, when fragment wasn't showing up. The problem was that I removed AndroidAnnotations, but forgot to move the code from onViewCreated and onCreate methods to the onCreateView. I found this mistake by comparing the code of two fragments - one, that was showing up and the other that wasn't. So, if you have similar problems, try to check the code of fragments. It may not show any errors at first glance, but will not still work or show up because of those errors.
Particularly, check that you have this method and that you inflate a view:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.your_fragment_layout, container, false);
return v;
}